Daily Observations at Hyslop Exp. Stn., Corvallis
January 2009
Bold = new daily record set (old record, year)
| Day | Max Temp (F) | Min Temp (F) | Precip (in) | Snow (in) | 2 in soil Max | 2 in soil Min | 4 in soil Max | 4 in soil Min | Heating Deg. Days | Cooling Deg. Days | Growing Deg. Days | Evaporation (in.) |
| 1 | 50 | 40 | 0.2 | 0 | 45 | 43 | 43 | 41 | 20 | 0 | 0 | 0 |
| 2 | 54 | 36 | 1.78 | 0 | 49 | 43 | 47 | 42 | 20 | 0 | 0 | 0 |
| 3 | 46 | 30 | 0.03 | 0 | 47 | 37 | 46 | 39 | 27 | 0 | 0 | 0 |
| 4 | 44 | 28 | 0 | 0 | 46 | 36 | 42 | 38 | 29 | 0 | 0 | 0 |
| 5 | 47 | 28 | 0.38 | 0 | 42 | 36 | 40 | 35 | 27 | 0 | 0 | 0 |
| 6 | 50 | 45 | 0.12 | 0 | 47 | 42 | 45 | 41 | 17 | 0 | 0 | 0 |
| 7 | 54 | 47 | 0.26 | 0 | 50 | 46 | 47 | 44 | 14 | 0 | 1 | 0 |
| 8 | 54 | 46 | 0.47 | 0 | 51 | 49 | 48 | 47 | 15 | 0 | 0 | 0 |
| 9 | 51 | 30 | T | 0 | 52 | 37 | 49 | 41 | 24 | 0 | 0 | 0 |
| 10 | 43 | 31 | 0.01 | 0 | 44 | 37 | 43 | 39 | 28 | 0 | 0 | 0 |
| 11 | 44 | 35 | 0 | 0 | 43 | 39 | 42 | 40 | 25 | 0 | 0 | 0 |
| 12 | 53 | 43 | 0.01 | 0 | 51 | 42 | 47 | 41 | 17 | 0 | 0 | 0 |
| 13 | 56 | 43 | 0.01 | 0 | 55 | 46 | 50 | 45 | 15 | 0 | 0 | 0 |
| 14 | 48 | 39 | T | 0 | 51 | 45 | 49 | 47 | 21 | 0 | 0 | 0 |
| 15 | 42 | 36 | T | 0 | 47 | 42 | 47 | 45 | 26 | 0 | 0 | 0 |
| 16 | 44 | 30 | T | 0 | 49 | 40 | 46 | 43 | 28 | 0 | 0 | 0 |
| 17 | 37 | 26 | 0 | 0 | 44 | 37 | 44 | 40 | 33 | 0 | 0 | 0 |
| 18 | 48 | 26 | 0 | 0 | 47 | 36 | 43 | 38 | 28 | 0 | 0 | 0 |
| 19 | 51 | 27 | 0 | 0 | 46 | 35 | 43 | 35 | 26 | 0 | 0 | 0 |
| 20 | 49 | 25 | 0 | 0 | 45 | 35 | 42 | 35 | 28 | 0 | 0 | 0 |
| 21 | 46 | 24 | 0 | 0 | 43 | 35 | 41 | 36 | 30 | 0 | 0 | 0 |
| 22 | 41 | 26 | 0 | 0 | 39 | 35 | 38 | 36 | 31 | 0 | 0 | 0 |
| 23 | 50 | 28 | 0.01 | 0 | 47 | 35 | 42 | 35 | 26 | 0 | 0 | 0 |
| 24 | 43 | 32 | 0.01 | 0 | 42 | 37 | 40 | 36 | 27 | 0 | 0 | 0 |
| 25 | 44 | 32 | 0.23 | 0 | 41 | 37 | 40 | 36 | 27 | 0 | 0 | 0 |
| 26 | 39 | 28 | 0 | 0 | 41 | 35 | 40 | 37 | 31 | 0 | 0 | 0 |
| 27 | 40 | 25 | 0 | 0 | 41 | 35 | 39 | 36 | 32 | 0 | 0 | 0 |
| 28 | 41 | 33 | 0.16 | 0 | 37 | 35 | 37 | 35 | 28 | 0 | 0 | 0 |
| 29 | 50 | 29 | 0.02 | 0 | 47 | 36 | 44 | 37 | 25 | 0 | 0 | 0 |
| 30 | 47 | 29 | 0 | 0 | 47 | 36 | 43 | 37 | 27 | 0 | 0 | 0 |
| 31 | 39 | 28 | T | 0 | 42 | 36 | 41 | 38 | 31 | 0 | 0 | 0 |
| Average/Total | 46.6 | 32.4 | 3.70 | 0.00 | 45.7 | 38.5 | 43.5 | 39.2 | 783 | 0 | 1 | 0.000 |
| Departure | 1.1 | -0.6 | -3.12 |   |   |   |   |   |   |   |   |   |